one british official calling all of this "the greatest threat to the world financial system," but voices like that having very little effect here right now. a very uncertain 72 hours coming up, not just for the u.s., but for the world, dan. >> people all over the world worried. jim sciutto, thank you for your reporting this morning. let's bring in abc news senior political correspondent jon karl who's been all over this story from the jump. jon, we've got the boehner plan and the reid plan. everybody in washington knows neither of these things can pass, so what, if anything, is being done right now to craft some sort of compromise? >> reporter: well, there are, as you heard jim mention, quiet negotiations going on between harry reid and mitch mcconnell. trying to find middle ground. mitch mcconnell has been on the phone several times, a many told, with vice president biden over the last several days. they are trying to find one last-ditch effort to get what everybody knows needs to happen, dan, and that is something that has bipartisan support. i got to tell you, though, the atmosphere is so poisoned here, the question is, once they get that agreement, can they pass it?